DTC P2237-00: O2 Sensor Positive Current Control Circuit/Open - Bank 1, Sensor 1 [07/2015 - 08/2018]: Procedure

1. Switch the ignition off.
2. Disconnect the A/F sensor connector.
3. Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
4. Is there any malfunction?

   Result

   Result
   Yes
   No

Result: 

Yes 

See step  11

Result: 

No 

See step  2

1. Disconnect the ECM connector.
2. Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
3. Is there any malfunction?

   Result

   Result
   Yes
   No

Result: 

Yes 

See step  10

Result: 

No 

See step  3

1. Verify that the A/F sensor and ECM connectors are disconnected.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C6-4 - C27-82	Always	Below 1 Ω

   Result

   Result
   Yes
   No

Result: 

No 

See step  9

Result: 

Yes 

See step  4

1. Connect the Techstream to the DLC3.
2. Start the engine and warm it up completely.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Heated Exhaust Gas Oxygen Sensor (bank 1, sensor 1).

   Refer to ON-BOARD DIAGNOSTIC TEST [07/2015 - ]

   Powertrain > Engine > Data List 

   Tester Display
   Heated Exhaust Gas Oxygen Sensor (bank 1, sensor 1)

5. Drive the vehicle under the following conditions.
   WARNING:

   • When the Techstream is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the Techstream using the PID/DATA MONITOR AND RECORD capturing function and inspect later.
   • While performing this step, always operate the vehicle in a safe and lawful manner.
   • After increasing the engine speed to 3000 rpm, decelerate using engine braking.
6. Is the displayed PID value as follows?
   • Heated Exhaust Gas Oxygen Sensor (bank 1, sensor 1): 0.25 mA or more

   Result

   Result
   Yes
   No

Result: 

No 

See step  8

Result: 

Yes 

See step  5

1. Always reconnect all disconnected connectors.
2. Clear the DTC from the ECM memory using the Techstream.

   Refer to CLEARING DTC [07/2015 - ]

   Powertrain > Engine > Clear DTCs 

3. Perform the KOER self test.

   Refer to ON-DEMAND SELF-TEST/KEY-ON ENGINE RUNNING SELF-TEST [07/2015 - ]

   Powertrain > Engine > Utility 

   Tester Display
   Key-On Engine Running Self-Test

4. Is the PENDING CODE for this DTC present?

   Result

   Result
   Yes
   No

Result: 

Yes 

See step  7

Result: 

No 

See step  6

1. Is any other DTC or pending code stored?

   Result

   Result
   Yes
   No

Result: 

No 

DTC TROUBLESHOOTING COMPLETED. 

Result: 

Yes 

GO TO THE APPLICABLE DTC INSPECTION. 

1. Refer to DIAGNOSTIC TROUBLE CODE CHART [07/2015 - 08/2018]

1. If the malfunction recurs, replace the ECM.

   Refer to REMOVAL [07/2015 - ]

2. Go to the next step.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Refer to REMOVAL [07/2015 - ]
2. Then go to the next step.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

If there is a common connector: 

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
• Repair or replace the malfunctioning part.

If there is no common connector: 

• Repair or replace the wiring harness which has an open circuit.

1. Go to the next step.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Refer to REMOVAL [07/2015 - ]
2. Go to the next step.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Refer to REMOVAL [07/2015 - ]
2. Then go to the next step.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5